animationthread.java

java写的qq代码实现qq的部分功能

/*
 * LumaQQ - Java QQ Client
 *
 * Copyright (C) 2004 luma <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package edu.tsinghua.lumaqq.widgets.rich;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.ImageLoader;

/**
 * 动画线程
 * 
 * @author luma
 */
public class AnimationThread extends Thread {
    private RichBox richbox;
    private ImageResolver resolver;
    
    public static final int MAX = 5;
    
    private Integer[] keys;
    private int[] frames;
    private int[] nextFrameTime;
    private GC[] gc;
    private int time;
    
    private int pos;
    
    // 停止标志
    private volatile boolean stop;

    public AnimationThread(RichBox richbox, ImageResolver resolver) {
        this.richbox = richbox;
        this.resolver = resolver;
        keys = new Integer[MAX];
        frames = new int[MAX];
        nextFrameTime = new int[MAX];
        gc = new GC[MAX];
        pos = 0;
        stop = false;
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.lang.Thread#run()
     */
    public void run() {
        while(!isStop()) {            
            try {
                // wait frame
                synchronized(this) {
	                wait(200);                    
                }                
            } catch (InterruptedException e) {
                if(isStop())
                    break;
            }
            time += 200;
            
            // 检查richbox是否已经dispose
            if(richbox == null || richbox.isDisposed())
                break;

			richbox.getDisplay().asyncExec(new Runnable() {
			    public void run() {
			        try {
			        	for(int i = 0; i < MAX; i++) {
			        		if(keys[i] == null)
			        			continue;
			        		
			        		// 如果下一帧的时间没到，跳过
			        		if(nextFrameTime[i] > time)
			        			continue;
			        		
			        		// 得到image data
			        		int tag = keys[i].intValue() >>> 16;
			        		int code = keys[i].intValue() & 0xFFFF;
			        		ImageLoader loader = resolver.getImageLoader(tag, code);
			        		ImageData frameData = loader.data[frames[i]];			        		
			        		
			        		ImageData previous = (frames[i] > 0) ? loader.data[frames[i] - 1] : loader.data[loader.data.length - 1];
							Image frame = new Image(richbox.getDisplay(), frameData);								
							if(previous.disposalMethod == SWT.DM_FILL_BACKGROUND)
								gc[i].fillRectangle(previous.x, previous.y, previous.width, previous.height);   
							else if(previous.disposalMethod == SWT.DM_FILL_PREVIOUS) {
								Image previousImage = new Image(richbox.getDisplay(), previous);
								gc[i].drawImage(previousImage, 0, 0, previous.width, previous.height, previous.x, previous.y, previous.width, previous.height);
								previousImage.dispose();
							}
							if(frames[i] == 0)
								gc[i].fillRectangle(frame.getBounds());
							gc[i].drawImage(frame, 0, 0, frameData.width, frameData.height, frameData.x, frameData.y, frameData.width, frameData.height);
							frame.dispose();		
							
							frames[i] = (frames[i] + 1) % loader.data.length;
							
			        		nextFrameTime[i] = time + frameData.delayTime * 10;
			        	}
						richbox.redraw();
					} catch (Throwable e) {
					}
			    }
			});
        }
    }

    /**
     * 释放资源
     */
    public synchronized void dispose() {
    	for(int i = 0; i < MAX; i++) {
    		if(gc[i] != null)
    			gc[i].dispose();
    	}    		
    	stop = true;
    	notify();
    }
    
    /**
     * @return Returns the stop.
     */
    public synchronized boolean isStop() {
        return stop;
    }

	/**
	 * 增加需要动画的表情key
	 * 
	 * @param key
	 * @param gc
	 */
	public synchronized void putImage(Integer key, GC context) {
		keys[pos] = key;
		frames[pos] = 0;
		nextFrameTime[pos] = 0;
		if(gc[pos] != null) {
			gc[pos].dispose();
			gc[pos] = null;
		}
		gc[pos] = context;
		pos++;
		if(pos == MAX)
			pos = 0;
	}

	/**
	 * @param key
	 */
	public synchronized void remove(Integer key) {
		for(int i = 0; i < MAX; i++) {
			if(key.equals(keys[i])) {
				keys[i] = null;
				if(gc[i] != null) {
					gc[i].dispose();
					gc[i] = null;
				}
				return;
			}
		}
	}
}